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unit-class_const_iterator.cpp
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unit-class_const_iterator.cpp
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/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++ (test suite)
| | |__ | | | | | | version 3.6.0
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
SPDX-License-Identifier: MIT
Copyright (c) 2013-2019 Niels Lohmann <http://nlohmann.me>.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "catch.hpp"
#define private public
#include <nlohmann/json.hpp>
using nlohmann::json;
TEST_CASE("const_iterator class")
{
SECTION("construction")
{
SECTION("constructor")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it(&j);
}
SECTION("object")
{
json j(json::value_t::object);
json::const_iterator it(&j);
}
SECTION("array")
{
json j(json::value_t::array);
json::const_iterator it(&j);
}
}
SECTION("copy assignment")
{
json j(json::value_t::null);
json::const_iterator it(&j);
json::const_iterator it2(&j);
it2 = it;
}
SECTION("copy constructor from non-const iterator")
{
SECTION("create from uninitialized iterator")
{
const json::iterator it {};
json::const_iterator cit(it);
}
SECTION("create from initialized iterator")
{
json j;
const json::iterator it = j.begin();
json::const_iterator cit(it);
}
}
}
SECTION("initialization")
{
SECTION("set_begin")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it(&j);
it.set_begin();
CHECK((it == j.cbegin()));
}
SECTION("object")
{
json j(json::value_t::object);
json::const_iterator it(&j);
it.set_begin();
CHECK((it == j.cbegin()));
}
SECTION("array")
{
json j(json::value_t::array);
json::const_iterator it(&j);
it.set_begin();
CHECK((it == j.cbegin()));
}
}
SECTION("set_end")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it(&j);
it.set_end();
CHECK((it == j.cend()));
}
SECTION("object")
{
json j(json::value_t::object);
json::const_iterator it(&j);
it.set_end();
CHECK((it == j.cend()));
}
SECTION("array")
{
json j(json::value_t::array);
json::const_iterator it(&j);
it.set_end();
CHECK((it == j.cend()));
}
}
}
SECTION("element access")
{
SECTION("operator*")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it = j.cbegin();
CHECK_THROWS_AS(*it, json::invalid_iterator&);
CHECK_THROWS_WITH(*it, "[json.exception.invalid_iterator.214] cannot get value");
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cbegin();
CHECK(*it == json(17));
it = j.cend();
CHECK_THROWS_AS(*it, json::invalid_iterator&);
CHECK_THROWS_WITH(*it, "[json.exception.invalid_iterator.214] cannot get value");
}
SECTION("object")
{
json j({{"foo", "bar"}});
json::const_iterator it = j.cbegin();
CHECK(*it == json("bar"));
}
SECTION("array")
{
json j({1, 2, 3, 4});
json::const_iterator it = j.cbegin();
CHECK(*it == json(1));
}
}
SECTION("operator->")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it = j.cbegin();
CHECK_THROWS_AS(std::string(it->type_name()), json::invalid_iterator&);
CHECK_THROWS_WITH(std::string(it->type_name()), "[json.exception.invalid_iterator.214] cannot get value");
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cbegin();
CHECK(std::string(it->type_name()) == "number");
it = j.cend();
CHECK_THROWS_AS(std::string(it->type_name()), json::invalid_iterator&);
CHECK_THROWS_WITH(std::string(it->type_name()), "[json.exception.invalid_iterator.214] cannot get value");
}
SECTION("object")
{
json j({{"foo", "bar"}});
json::const_iterator it = j.cbegin();
CHECK(std::string(it->type_name()) == "string");
}
SECTION("array")
{
json j({1, 2, 3, 4});
json::const_iterator it = j.cbegin();
CHECK(std::string(it->type_name()) == "number");
}
}
}
SECTION("increment/decrement")
{
SECTION("post-increment")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it = j.cbegin();
CHECK((it.m_it.primitive_iterator.m_it == 1));
it++;
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cbegin();
CHECK((it.m_it.primitive_iterator.m_it == 0));
it++;
CHECK((it.m_it.primitive_iterator.m_it == 1));
it++;
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
{
json j({{"foo", "bar"}});
json::const_iterator it = j.cbegin();
CHECK((it.m_it.object_iterator == it.m_object->m_value.object->begin()));
it++;
CHECK((it.m_it.object_iterator == it.m_object->m_value.object->end()));
}
SECTION("array")
{
json j({1, 2, 3, 4});
json::const_iterator it = j.cbegin();
CHECK((it.m_it.array_iterator == it.m_object->m_value.array->begin()));
it++;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
it++;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
it++;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
it++;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator == it.m_object->m_value.array->end()));
}
}
SECTION("pre-increment")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it = j.cbegin();
CHECK((it.m_it.primitive_iterator.m_it == 1));
++it;
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cbegin();
CHECK((it.m_it.primitive_iterator.m_it == 0));
++it;
CHECK((it.m_it.primitive_iterator.m_it == 1));
++it;
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
{
json j({{"foo", "bar"}});
json::const_iterator it = j.cbegin();
CHECK((it.m_it.object_iterator == it.m_object->m_value.object->begin()));
++it;
CHECK((it.m_it.object_iterator == it.m_object->m_value.object->end()));
}
SECTION("array")
{
json j({1, 2, 3, 4});
json::const_iterator it = j.cbegin();
CHECK((it.m_it.array_iterator == it.m_object->m_value.array->begin()));
++it;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
++it;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
++it;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
++it;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator == it.m_object->m_value.array->end()));
}
}
SECTION("post-decrement")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it = j.cend();
CHECK((it.m_it.primitive_iterator.m_it == 1));
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cend();
CHECK((it.m_it.primitive_iterator.m_it == 1));
it--;
CHECK((it.m_it.primitive_iterator.m_it == 0));
it--;
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
{
json j({{"foo", "bar"}});
json::const_iterator it = j.cend();
CHECK((it.m_it.object_iterator == it.m_object->m_value.object->end()));
it--;
CHECK((it.m_it.object_iterator == it.m_object->m_value.object->begin()));
}
SECTION("array")
{
json j({1, 2, 3, 4});
json::const_iterator it = j.cend();
CHECK((it.m_it.array_iterator == it.m_object->m_value.array->end()));
it--;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
it--;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
it--;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
it--;
CHECK((it.m_it.array_iterator == it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
}
}
SECTION("pre-decrement")
{
SECTION("null")
{
json j(json::value_t::null);
json::const_iterator it = j.cend();
CHECK((it.m_it.primitive_iterator.m_it == 1));
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cend();
CHECK((it.m_it.primitive_iterator.m_it == 1));
--it;
CHECK((it.m_it.primitive_iterator.m_it == 0));
--it;
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
{
json j({{"foo", "bar"}});
json::const_iterator it = j.cend();
CHECK((it.m_it.object_iterator == it.m_object->m_value.object->end()));
--it;
CHECK((it.m_it.object_iterator == it.m_object->m_value.object->begin()));
}
SECTION("array")
{
json j({1, 2, 3, 4});
json::const_iterator it = j.cend();
CHECK((it.m_it.array_iterator == it.m_object->m_value.array->end()));
--it;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
--it;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
--it;
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
--it;
CHECK((it.m_it.array_iterator == it.m_object->m_value.array->begin()));
CHECK((it.m_it.array_iterator != it.m_object->m_value.array->end()));
}
}
}
}